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HVAC technician arriving at a home in Oshawa

Serving Oshawa and surrounding areas

Oshawa HVAC Repair, Furnace Replacement & Boiler Service

Best HVAC Toronto is a TSSA-certified heating, cooling, and gas contractor serving Oshawa and Durham Region, with over 20 years of combined crew experience. We repair and replace furnaces, cast iron and condensing boilers, central air conditioners, and cold-climate heat pumps, and clear Enbridge red tags 24/7, in homes from Downtown Oshawa, O'Neill, and Lakeview to Taunton, Windfields, and Kedron.

  • 2-hour emergency response
  • TSSA G1/G2 certified, $2M insured
  • 4.9 stars from 150+ reviews
  • 4.9 (150+ reviews)
  • TSSA G1/G2 Certified & $2M Insured
  • 2-Hour Emergency Response
  • Manufacturer-Authorized Dealer

Furnace Out or Gas Red-Tagged? Help Is Dispatched 24/7

2-hour emergency response for Oshawa homeowners, day or night.

Enbridge shut off your gas

A red tag means no heat and no hot water until a licensed technician clears it. We respond within our stated response window and restore most services within 24 hours.

Furnace or AC failed today

A dead furnace in winter or a failed air conditioner in summer heat is not a next-week problem. We hold same-day weekday capacity and dispatch 24/7 in an emergency.

You have been quoted without explanation

Every job gets a written quote before work starts, with the findings explained in plain language. No hidden fees, no pressure.

Neighbourhoods we cover in Oshawa

2-hour emergency response across every one of these, plus the surrounding streets.

  • Downtown Oshawa
  • O'Neill
  • Lakeview
  • McLaughlin
  • Vanier
  • Donevan
  • Eastdale
  • Centennial
  • Samac
  • Pinecrest
  • Northglen
  • Taunton
  • Windfields
  • Kedron

Last updated:

Oshawa HVAC Services: Furnaces, Boilers, AC & Heat Pumps

Best HVAC Toronto is a TSSA-certified heating, cooling, and gas contractor serving Oshawa and Durham Region, with over 20 years of combined crew experience. We repair and replace furnaces, cast iron and condensing boilers, central air conditioners, and cold-climate heat pumps, and clear Enbridge red tags 24/7, in homes from Downtown Oshawa, O'Neill, and Lakeview to Taunton, Windfields, and Kedron.

Best HVAC Toronto G1/G2 gas technician testing a red-tagged furnace with a combustion analyzer in a Toronto basement Our specialty

24/7 Enbridge red tag removal across Toronto and the GTA, with a 2-hour typical emergency response and a TSSA G1/G2 clearance signature on the first visit. We clear Type A tags (immediate natural gas shut-off for a leak, cracked furnace heat exchanger, or carbon monoxide spillage) and Type B tags (30 to 45-day compliance window for venting, piping, or gas pressure deficiencies) to Ontario Regulation 215/01 and CSA B149.1, then coordinate the relight with Enbridge Gas. Inspections start at $350 (2026 pricing).

Best HVAC Toronto technician installing a high-efficiency condensing furnace in a Toronto basement mechanical room Most requested

Furnace Installation & Repair

Furnace installation, furnace repair, and emergency no-heat response across Toronto and the GTA. Our TSSA-certified crew installs high-efficiency condensing gas furnaces from Lennox, Carrier, and Trane sized to your home using Manual J heat load calculation, and we repair every major furnace fault: hot surface igniter failures, flame sensor faults, draft inducer motor issues, pressure switch problems, and secondary heat exchanger diagnostics. Every high-efficiency furnace we install is ENERGY STAR rated with ECM variable-speed blower motor, single-stage or two-stage burner options depending on home size, and PVC condensing venting to code. Ontario Home Renovation Savings (HRS) Program pays $250-$1,000 on qualifying furnace installations, and rebate paperwork is filed on your behalf. TSSA safety inspection included on every install. Furnace repairs typically run $250-$500 on a $150 diagnostic; new furnace installation runs $3,500 to $7,500 depending on AFUE tier, single-stage vs two-stage vs modulating configuration, ductwork correction, and venting requirements. Same-day weekday emergency capacity and 24/7 dispatch during winter cold snaps.

Best HVAC Toronto technician checking refrigerant gauges at an outdoor AC condenser beside a Toronto home

Central air conditioning installation, AC repair, and 24/7 emergency dispatch during Toronto summer heat waves. Our TSSA-certified crew installs SEER2 and EER2-rated condensing units from Lennox and Carrier with a scroll compressor, matched evaporator coil, and thermostatic expansion valve (TXV), sized with a Manual J heat load calculation for your home. We handle the R-410A to R-454B and R-32 refrigerant transition, and we hold current EPA 608 and A2L refrigerant certification for refrigerant handling and CFM airflow balance commissioning. AC repairs cover capacitor and contactor faults, refrigerant leaks with subcooling and superheat diagnostics, and frozen coil and airflow issues, starting with a $150 diagnostic that applies to the repair. Most repairs run $250-$600; central AC installation runs $4,000-$8,000 installed depending on tonnage, SEER2 rating, and whether ductwork correction or line set replacement is needed. Typical emergency response is 2 hours across the GTA.

Best HVAC Toronto technician commissioning a cold-climate heat pump outdoor unit beside a Toronto home in winter Rebates up to $6,500

Cold-climate air-source heat pump (ccASHP) installation across Toronto and the GTA, covering both single-stage residential retrofits and dual-fuel hybrid systems paired with existing gas furnaces. Every heat pump we install is NEEP cold-climate listed and NRCan qualified for the current Ontario Home Renovation Savings (HRS) rebate up to $7,500, Canada Greener Homes Loan up to $40,000 interest-free, and the Toronto BetterHomesTO HELP program stacked where eligible. Our TSSA-certified crew sizes every heat pump using Manual J heat load calculation and Manual S equipment selection to match HSPF2 and SEER2 ratings to your home, with defrost cycle commissioning, reversing valve testing, auxiliary heat strip integration, and inverter compressor tuning at start-up. Total system cost typically lands between $8,000 and $15,000 installed before rebates, with net cost after HRS and Greener Homes stacking often between $2,000 and $7,000 out of pocket.

Best HVAC Toronto technician servicing a wall-mounted condensing combi boiler in a Toronto basement utility room

Boiler installation, boiler repair, and hydronic radiant in-floor heating system service across Toronto and the GTA. Our TSSA-certified crew installs condensing combi-boilers, system boilers, and cast iron sectional boiler retrofits from Navien, Bosch, and Viessmann, with proper hydronic loop commissioning covering circulator pump sizing, expansion tank pressure, low-water cutoff (LWCO) safety installation, and outdoor reset control programming to modulate boiler output against outdoor temperature. Repairs cover pump failures, diverter valve faults on combi units, pressure loss diagnostics, kettling from limescale buildup on the primary heat exchanger, and inconsistent radiator temperature balancing across the loop. Every combi boiler installation includes DHW flow rate sizing against household hot water demand and PVC or polypropylene venting to CSA B149.1. As of 2026, boiler installation runs $5,000-$15,000 depending on type and capacity: combi boilers typically $6,000-$11,000 installed, condensing system boilers with indirect tanks and multiple zones $7,000-$13,000, and larger multi-zone or commercial boilers up to $15,000. Hydronic zone additions and radiator retrofits are quoted per project. Boiler repair starts with a $150 diagnostic, and most service calls run $250-$500.

Best HVAC Toronto gas technician installing a black iron gas line with a shut-off valve in a Toronto basement

TSSA-permitted natural gas line installation across Toronto and the GTA for furnaces, water heaters, ranges, dryers, gas fireplaces, standby generators, outdoor BBQs, fire tables, and outdoor kitchen manifolds. Our G1 and G2 gas technicians install Schedule 40 black iron pipe for main runs and CSST (corrugated stainless steel tubing) for runs through finished space, with shut-off ball valve at every appliance, sediment trap (drip leg) at each terminal, and exterior quick-disconnect box for outdoor BBQ hookups. Every installation includes BTU load sizing against total appliance demand, verification that the existing meter and main supply can carry the added load, water column pressure (W.C.) reading at each appliance, and a formal TSSA pressure test tag filed on completion to CSA B149.1. Permits pulled and inspection sign-off filed on your behalf. Short indoor runs to a stove or dryer typically land $400-$800 installed; BBQ hookups run $400-$1,200 depending on outdoor run length; generator connections and outdoor kitchen manifolds run $800-$3,500 based on load and complexity.

Best HVAC Toronto technician installing a wall-mounted condensing tankless water heater in a Toronto basement

Condensing tankless on-demand water heater installation, replacement, and repair across Toronto and the GTA. Our TSSA-certified crew installs Navien, Rinnai, and Bosch tankless units sized to household DHW flow rate demand (typically 12-16 LPM at Toronto winter temperature rise), with power direct vent (PDV) or concentric venting configured to code, condensate drainage tie-in, and gas line upsize where required to handle the higher BTU demand versus a conventional tank. Every install includes UEF (Uniform Energy Factor) verification for ENERGY STAR rebate eligibility, condensing heat exchanger commissioning at rated output, and annual descaling flush service enrollment to protect the heat exchanger from Toronto moderately hard water. We handle rental tank buyouts through Reliance and Enercare and coordinate the swap so hot water service is uninterrupted. Condensing tankless installations run $3,500-$6,500 installed depending on capacity, venting complexity, and gas line requirements. Water heater repair diagnostics start from $150; typical descaling flush service runs $180-$250 annually and is included in maintenance plan enrolments.

Best HVAC Toronto technician connecting water lines on a new gas hot water tank in a Toronto basement

Tank water heater installation, replacement, and repair across Toronto and the GTA in gas, electric, and hybrid heat pump water heater configurations. Our TSSA-certified crew installs Bradford White, Rheem, and premium John Wood units with proper atmospheric vent or power direct vent selection per CSA B149.1, sacrificial anode rod inspection on every replacement, T&P (temperature and pressure) relief valve testing, and expansion tank installation where incoming water service pressure demands it. We handle rental water heater return coordination with Reliance and Enercare, including buyout negotiation and depot return logistics so hot water service is uninterrupted through the swap. Hybrid heat pump water heaters (a growing category with 40-60% lower operating cost than resistance electric) run $2,500-$4,500 installed depending on capacity and rebate stacking under HRS and Canada Greener Homes. Standard 40 or 50-gallon gas tank installations run $1,800-$3,500 installed. Electric tanks run $1,500-$2,800. Repairs typically run $200-$500 on a $150 diagnostic.

Best HVAC Toronto technician mounting a ductless mini-split indoor head on the wall of a Toronto home addition

Ductless mini-splits bring air conditioning and year-round heat pump heating to residential spaces without ductwork: home additions, finished basements, attic conversions, laneway suites, garages, sunrooms, condos, and older Toronto homes on hot-water radiators. Our TSSA-certified HVAC technicians install single-zone and multi-zone systems from Mitsubishi Electric, Daikin, LG, and Fujitsu, with SEER2 and HSPF2-rated inverter compressor outdoor units connected via insulated refrigerant lines to indoor units (wall-mount, floor-mount, or concealed ceiling cassette), and full zoning commissioning so each indoor unit operates independently. Condo installations coordinate with property management for approvals, common-element access, and condo fan coil location. Every install includes proper refrigerant line brazing and evacuation to 500 microns, condensate drain path verification, and start-up commissioning with subcool and superheat readings. 2026 pricing: $3,500-$8,000 per zone installed; multi-zone systems run $9,000-$18,000 depending on zone count and indoor unit style. Ontario Home Renovation Savings (HRS) rebate eligibility checked on every quote, and every installation carries a 2-year labour warranty.

Best HVAC Toronto technician installing a heat recovery ventilator with insulated ducting in a Toronto basement

Whole-home Indoor Air Quality (IAQ) systems across Toronto and the GTA covering Heat Recovery Ventilator (HRV) and Energy Recovery Ventilator (ERV) installation, MERV 11, MERV 13, and MERV 16 media filter cabinet upgrades, HEPA bypass filtration for allergy-focused homes, bypass and steam humidifier installation, germicidal UV-C lamps at the evaporator coil, and ecobee and Nest smart thermostat setup. Every job starts with indoor air quality testing: relative humidity readings, a static pressure check across the air handler, and a carbon monoxide and combustion check on gas appliances. Our TSSA-certified crew then chooses HRV or ERV based on your home's moisture load and sizes ventilation to the ASHRAE 62.2 residential standard. 2026 installed pricing: filter cabinet upgrades $250-$650, bypass humidifiers $400-$800, steam humidifiers $1,500-$2,500, UV-C lamps $500-$1,500, and HRV or ERV systems $2,500-$4,500. Every system ties into your existing furnace blower and thermostat.

Best HVAC Toronto technician cleaning a home supply duct with a rotary brush and vacuum hose

Residential duct cleaning, commercial duct cleaning, ductwork design and installation, duct sealing, and dryer vent cleaning across Toronto and the GTA, from Etobicoke and North York to Mississauga and Markham. Our licensed, TSSA-certified and WSIB-covered technicians correct the undersized return and supply plenum sizing common in post-war Toronto bungalows, balance CFM airflow across zones using static duct pressure and manometer readings, and install new duct runs to the Ontario Building Code with proper R-value insulation on runs through unconditioned space. Duct cleaning follows NADCA cleaning standards, using negative-air machines with HEPA filtration and rotary brush agitation to remove accumulated dust from supply and return ducts, the blower housing, and the evaporator coil cabinet, which improves indoor air quality where the ducts are genuinely contaminated. Dryer vent cleaning covers full mechanical brushing from the dryer to the outdoor termination, with bird nest and blockage inspection, to cut the risk of a lint fire. 2026 pricing: duct cleaning runs $400-$800 for a full residential system; dryer vent cleaning runs $150-$300; MERV filtration upgrades run $250-$650; commercial and light industrial duct cleaning, new ductwork, zone additions, and rebalancing are quoted per project after an airflow survey.

Best HVAC Toronto technicians servicing a commercial rooftop unit on a flat roof in Toronto

Commercial HVAC installation, commercial heating and air conditioning service, and Planned Maintenance Agreements (PMAs) across Toronto and the GTA for restaurants, retail, offices, warehouses, and light industrial facilities. Our TSSA-certified crew services Rooftop Units (RTUs), packaged gas/electric units, make-up air units (MUA) for restaurant kitchen exhaust replacement, variable air volume (VAV) box commissioning, economizer with enthalpy sensor tuning, and 3-phase power HVAC equipment. Every install and service follows ASHRAE 62.1 for ventilation (typically 15-20 CFM outdoor air per occupant) and ASHRAE 90.1 for building energy performance code. Restaurant HVAC covers Type I hood exhaust rate sizing per NFPA 96 and matching MUA capacity for negative-pressure avoidance. Retail HVAC covers zone control commissioning across leased areas, thermostat migration to smart controls, and demolition-and-rebuild airflow rebalancing. Standard PMAs cover quarterly filter changes, biannual coil cleaning, annual combustion analysis and belt inspection, and priority dispatch during heat waves and cold snaps. A typical smaller commercial PMA (3-5 RTUs, 20,000-40,000 sq ft) runs $2,000-$4,500 annually at 2026 rates, with 10-15% repair discounts.

TSSA-certified HVAC technician diagnosing a failed furnace in a Toronto basement mechanical room during a winter emergency call

Emergency furnace repair across Toronto and the GTA with 24/7 dispatch and 2-hour target response window for no-heat winter calls. Our TSSA G1 or G2 certified crew diagnoses cracked heat exchangers with borescope and combustion analyzer verification, ignition failures (hot surface igniter, flame sensor, spark ignition), blower motor faults, limit switch trips, pressure switch failures, gas valve issues, and control board diagnostics. Common failure parts stocked on every van: hot surface igniters, flame sensors, pressure switches, capacitors, limit switches, blower motor modules, and thermostats, so most emergency repairs are completed same-visit. Repair coverage includes Lennox, Carrier, Trane, Bosch, Napoleon, and York furnaces plus every major brand in the GTA market. Emergency dispatch pricing runs $250 to $400 depending on time of day, with the diagnostic fee applied to any authorized repair. Cold-snap dispatch capacity held for the coldest 10 days of the winter when call volume spikes.

Best HVAC Toronto technician diagnosing a failed central air conditioner during a Toronto summer heat wave

Emergency air conditioning repair across Toronto and the GTA with a typical two-hour emergency response, 24/7. Our TSSA-certified crew diagnoses and repairs central AC systems and ductless mini-splits from Lennox, Carrier, Trane, Bosch, Mitsubishi, and Daikin, covering capacitor failures, contactor burnout, refrigerant leaks with electronic leak detection, frozen evaporator coils, blower motor faults, thermostat wiring issues, and control board diagnostics. Refrigerant transitions between R-410A and R-454B handled properly with EPA Section 608 certification. Common failure parts stocked on every van: run and start capacitors, contactors, TXV valves, thermostats, and blower motor modules, so most emergency repairs are completed same-visit. The diagnostic is $150 and applies to the repair, and most emergency repairs land between $300 and $700 CAD including parts. Every repair quoted in writing before work begins. Priority dispatch during heat waves and cold snaps when GTA call volume spikes. 24/7 live answering, not voicemail.

Best HVAC Toronto TSSA-certified technician arriving for a 24/7 emergency call at a Toronto home

24/7 HVAC emergency dispatch across Toronto and the GTA with live phone answering, not voicemail. Our licensed, TSSA G1/G2 certified technicians handle emergency furnace repair, air conditioner repair, boiler and heat pump breakdowns, gas leaks, Enbridge Red Tags, cracked heat exchanger diagnostics, and CO alarm activations with a target 2-hour on-site window. Every van stocks hot surface igniters, flame sensors, pressure switches, capacitors, contactors, limit switches, TXV valves, thermostats, and blower motor modules, so most emergency repairs are completed same-visit. The emergency diagnostic is $150 and is applied to any authorized repair, with most emergency repairs between $300 and $800 CAD. Dispatch capacity is held for cold snaps and heat waves, the coldest and hottest days of the year.

Best HVAC Toronto technician completing Ontario heat pump rebate forms with a homeowner at a Toronto kitchen table HRS rebates up to $7,500

Ontario heat pump rebate paperwork filing across Toronto and the GTA. Our crew handles the full rebate stack on qualifying cold-climate air-source heat pump (ccASHP) installations: Home Renovation Savings (HRS) program up to $7,500 for full electric heat pump replacements of gas heating and $2,000 for dual-fuel hybrid heat pump plus gas furnace systems, Canada Greener Homes Loan up to $40,000 interest-free with 10-year repayment on qualifying retrofits, and Toronto BetterHomesTO HELP program up to $125,000 low-interest property-tax-repayment loan for Toronto homeowners. Pre-installation EnerGuide evaluation coordination, post-installation NEEP-listed ccASHP model verification and documentation, HSPF2 sizing certification, and full paperwork submission are included at no extra charge on any heat pump we install. Standalone rebate filing for heat pumps installed by other contractors is available at $250 to $500 flat fee depending on which programs stack. Ontario rebate program eligibility and expected rebate figures confirmed in writing during the estimate, not after installation.

Best HVAC Toronto TSSA-certified technician connecting a natural gas BBQ quick-disconnect box on a Toronto backyard patio

BBQ Gas Line Hookup

Natural gas BBQ hookups and gas line installation for outdoor grills, fire tables, fire pits, patio heaters, and outdoor kitchens across Toronto and the GTA. Our TSSA G1/G2 certified gas technicians install Schedule 40 black iron pipe or CSST (corrugated stainless steel tubing) sized to appliance BTU load, with a quick-disconnect valve at the appliance for winter storage, a full pressure test to TSSA specifications, and permit handling where required. Every job follows the CSA B149.1 gas code, the Ontario Fire Code, and applicable municipal bylaws for exterior gas installations. BBQ hookup pricing runs $400 to $1,200 CAD (2026 rates) depending on run length from the nearest interior supply point, the number of penetrations through the building envelope, and existing gas meter capacity. Longer runs to outdoor kitchens or pool heaters with a higher BTU load can require a gas meter upgrade with Enbridge Gas, which we coordinate as part of the quote. Written quote provided before any drilling or excavation begins.

Best HVAC Toronto TSSA-certified technician installing a direct-vent gas fireplace insert beside a brick hearth in an East York home

Natural gas fireplace installation, insert conversion, and direct-vent commissioning across Toronto and the GTA. Our TSSA G2 certified gas crew installs direct-vent gas fireplaces, B-vent freestanding models, and ventless fireplace inserts from Napoleon, Valor, Regency, Heat and Glo, and Continental with full gas line installation from the nearest supply point, permit filing and TSSA pressure testing, carbon monoxide detector placement to Ontario Fire Code, and full commissioning with flame verification and combustion analysis. Wood-to-gas conversions, existing masonry chimney relining for gas inserts, and CSA B149.1 compliance documentation are standard on every job. Pricing runs $2,500 to $6,000 installed (2026 rates) depending on unit tier, venting run length, existing gas line proximity, and any code-required framing around the hearth and mantel. Every installation is quoted in writing before work begins and carries a 2-year labour warranty. 24/7 emergency response for gas leaks or Enbridge Red Tag issues on existing fireplaces.

Best HVAC Toronto technician doing an annual furnace tune-up with a combustion analyzer in a Toronto basement

Annual furnace tune-up across Toronto and the GTA with combustion analyzer readings, secondary heat exchanger inspection, blower motor amperage measurement, gas pressure calibration, and CO safety testing. Our TSSA G1 or G2 certified gas crew services Lennox, Carrier, Trane, Bosch, Napoleon, and York furnaces with a documented written service report accepted for manufacturer parts warranty compliance and Enbridge insurance verification. Tune-up covers ignition system verification (hot surface igniter, flame sensor, spark igniter), draft inducer motor amperage, static pressure and airflow balancing, evaporator coil cleanliness check on shared cabinets, condensate drain and neutralizer inspection on condensing furnaces, and thermostat calibration. Tune-up pricing runs $150 to $220 per visit, with maintenance plan pricing available for annual and biannual furnace and AC contracts. Recommended every fall before the heating season, and required by most manufacturer parts warranties as a condition of coverage.

Best HVAC Toronto TSSA-certified technician performing a spring AC tune-up on a backyard condenser unit in Toronto

Annual air conditioning tune-up across Toronto and the GTA with condensate line clearing, evaporator and condenser coil cleaning, refrigerant subcool and superheat readings, capacitor microfarad testing, contactor inspection, and thermostat calibration. Our TSSA-certified crew services Lennox, Carrier, Trane, Bosch, Napoleon, and York central AC and heat pumps plus Mitsubishi and Daikin ductless mini-splits, with a documented written service report accepted for manufacturer parts warranty compliance and insurance verification. Tune-up covers refrigerant charge verification (matched to superheat target for TXV systems and subcool target for fixed orifice systems), condenser fan motor amperage, indoor blower amperage and static pressure, condensate pump function, TXV valve or fixed orifice operation, and thermostat wiring integrity. Tune-up pricing runs $150 to $220 per visit with maintenance plan pricing available. Recommended every spring before the cooling season starts and required by most manufacturer parts warranties as a condition of continued coverage.

Best HVAC Toronto TSSA-certified technicians diagnosing a commercial rooftop unit on a flat Toronto retail plaza roof

Commercial rooftop unit repair and RTU diagnostics for Toronto, Mississauga, and GTA property managers, facility operators, and business owners. Our TSSA-certified crew services Carrier WeatherMaker, Trane Voyager, Lennox Landmark, York Sunline, Bosch, and Daikin commercial packaged RTUs with rapid dispatch and same-visit component repair. Symptom-by-symptom diagnostic covers compressor lockouts, ignition faults, tripped breakers, cooling loss, economizer damper failures, refrigerant leaks, and control board faults, with combustion analyzer readings on gas heating sections and superheat and subcool refrigerant checks on cooling circuits. Emergency dispatch runs 24/7 with a target 2-hour on-site response window across Toronto and the GTA, and every repair is quoted in writing before work begins. Property manager audience: Certificate of Insurance (COI) provided on request, master key protocols standard, background-checked technicians, and additional insured endorsements available for tenant agreements. Common failure parts stocked on every van so most emergency repairs are completed same-visit.

Best HVAC Toronto technician performing annual furnace maintenance in a Toronto basement

Annual furnace and AC maintenance plans for Toronto and GTA homes, delivered by TSSA-certified gas technicians. Basic ($199 per year) covers one furnace or AC tune-up plus 10% off repairs. Standard ($329 per year) covers both seasonal tune-ups, 15% off repairs, and priority scheduling. Premium ($499 per year) adds 20% off repairs, no diagnostic fee on any service call, and 24/7 emergency response. Every visit ends with a written service report that supports manufacturer warranty claims.

Best HVAC Toronto TSSA-certified technician servicing a commercial rooftop unit during a quarterly maintenance visit

Custom commercial HVAC preventative maintenance contracts for Toronto and GTA property managers, condo boards, and facility operators. Our TSSA-certified crew delivers quarterly, biannual, and monthly preventative maintenance agreements sized to your building portfolio, covering filter and belt swaps, evaporator and condenser coil washing, economizer damper and actuator tuning, refrigerant leak checks with electronic detection, gas pressure calibration, combustion analysis on gas heating sections, control sequence verification, safety interlock testing, and TSSA gas safety inspections. Every visit follows ASHRAE 62.1 ventilation code and ASHRAE 90.1 building energy performance requirements, producing a written service report exportable to Yardi, MRI, or RealPage property management platforms. Multi-property portfolio discounts, consolidated invoicing across your GTA buildings, and Certificate of Insurance (COI) on file with additional insured endorsements as needed. Master key protocols and background-checked technicians standard. Contract pricing ranges from $2,500 per year for small single-building PM through $25,000 per year for full multi-building portfolios with priority emergency dispatch.

Best HVAC Toronto TSSA-certified technician inspecting a gas-fired restaurant makeup air unit on a Toronto rooftop

Restaurant makeup air unit (MAU) servicing, replacement, and 24/7 emergency dispatch across Toronto and the GTA. Our TSSA-certified crew services Greenheck, Reznor, Modine, CaptiveAire, and Engineered Air gas-fired direct and indirect MAU systems with airflow balancing, gas pressure calibration, burner cleaning, and kitchen exhaust hood interlock testing. Every job aligns with TSSA B149.1 gas code, NFPA 96 fire code for kitchen exhaust systems, and Toronto Public Health inspection requirements. Emergency dispatch runs 24/7 with priority for closed-restaurant scenarios where MAU failure has taken the kitchen offline, target 2-hour on-site response across the GTA. Complete airflow balancing with capture hood measurement, negative pressure verification against exhaust hood CFM, and interlock switch validation to prevent kitchen back-drafting. Servicing runs $3,000 to $8,000 depending on unit size and scope, full replacements $15,000 to $60,000 for units in the 4,000 to 15,000 CFM range typical for commercial kitchens. COI and WSIB on file, ready for restaurant operators, property managers, and facility management companies.

Best HVAC Toronto crew craning a commercial rooftop unit off a flat roof during a single-day RTU replacement in Toronto

Turnkey commercial rooftop unit (RTU) crane replacement across Toronto and the GTA. Our TSSA-certified crew coordinates end-to-end RTU swaps including mobile crane rigging with insured crane rigger partners, custom steel curb adaptor fabrication for old-to-new RTU footprint mismatches, municipal road closure permit management across Toronto, Mississauga, Vaughan, Markham, and every GTA municipality, gas piping modifications, electrical disconnect and reconnect, refrigerant recovery and recharge, TSSA gas permit filing and sign-off, and Ontario Building Code compliance documentation. Single-day install logistics standard for restaurants and retail with after-hours and weekend access to minimise tenant impact, with multi-day scoping for larger RTU groups or complex penetration modifications. Pricing runs $20,000 to $150,000 per RTU swap depending on tonnage (typically 3 to 15 ton commercial packaged units), curb adaptor complexity, gas piping rerouting requirements, and permit scope. Property manager audience: Certificate of Insurance and additional insured endorsements provided upfront, master key protocols and background-checked crew, and consolidated project reporting for property management portfolios.

A Written Quote Before Any Work Begins

The same process whether it is a $150 diagnostic or a full system installation.

  1. 1

    Call us

    Tell us what's happening. Emergencies are dispatched immediately, and non-urgent visits are booked into the first slot that suits you.

  2. 2

    We diagnose

    A TSSA-certified technician tests properly, then explains what they found in plain language.

  3. 3

    You get a written quote

    A fixed price in writing before any work begins. Nothing proceeds until you agree to it.

  4. 4

    We do the work

    Installed, commissioned, and documented, with manufacturer parts coverage registered on your behalf.

Aging Furnace in Central Oshawa? Get a Free Estimate

Written quote before any work starts in Oshawa, no hidden fees, and manufacturer parts coverage registered on every installation.

Why O'Neill and Windfields Homeowners Call Us

Two-hour emergency response from Lakeview to Windfields, with 24/7 coverage for gas, no-heat, and no-AC calls

Combustion, venting, and CO testing on older homes in Downtown Oshawa, O'Neill, and McLaughlin

Cast iron boiler, radiator, and hydronic experience for pre-1960 and post-war housing

Best HVAC Toronto technicians are licensed TSSA G1/G2 gas fitters, WSIB-covered, $2M-insured, and background-checked on every call

Authorized Lennox, Carrier, Trane, Bosch, Napoleon, and York dealer, with a 2-year labour warranty and 5 to 10 years of manufacturer coverage on installations

2-Hour Dispatch via Highway 401, 407 & Simcoe Street

Our Durham crews reach Oshawa off Highway 401, Highway 407, and Highway 412, then work along Simcoe Street, King Street, Harmony Road, Ritson Road, and Taunton Road. Oshawa is the eastern edge of our regular service area and carries the same two-hour emergency target as the rest of the GTA. Lakeview, Downtown Oshawa, and the homes along the 401 are usually the quickest to reach, while Windfields, Kedron, and Taunton are served off the 407 at Simcoe Street and Harmony Road.

Calls near the Oshawa Centre, Lakeridge Health Oshawa, the Oshawa GO station, and the Ontario Tech University and Durham College campus on Simcoe Street North are part of our regular rotation. We also handle commercial HVAC for offices, retail plazas, and light-industrial units along the Highway 401 corridor, including rooftop unit (RTU) repair and replacement.

Need an HVAC technician near you in Oshawa? Gas leaks, Enbridge red tags, and no-heat or no-AC calls are dispatched 24/7, and same-day furnace and AC repair is available for most calls Monday through Saturday.

Post-War Bungalows to North Oshawa New Builds

Downtown Oshawa, O'Neill, McLaughlin, and Vanier hold some of the oldest housing in Durham, from century homes near Parkwood Estate to the post-war bungalows and storey-and-a-half houses built for Oshawa's auto workers. Many still run on cast iron boilers and radiators, or on furnaces well past their expected life with original chimney venting. We test combustion, venting, and carbon monoxide before recommending any upgrade, and replace old boilers with condensing or combi units without redoing the radiators.

Donevan, Eastdale, Centennial, Samac, and Pinecrest are mostly 1960s to 1990s detached homes, semis, and townhomes on forced air. Replacement there is a good time to check ductwork and return-air sizing and move to a high-efficiency furnace, central air conditioner, or dual-fuel heat pump setup. Near Ontario Tech and Durham College, we also repair heating and cooling in rental houses and basement apartments where landlords need a fast, documented fix.

Taunton, Windfields, Kedron, and Northglen are newer subdivisions where builder-grade furnaces and air conditioners are reaching their first replacement. These tighter homes are strong candidates for cold-climate heat pumps, HRVs, whole-home humidifiers, and smart thermostats to manage indoor air quality. As an authorized Lennox, Carrier, Trane, Bosch, Napoleon, and York dealer, we size every system to a load calculation rather than matching the old unit.

Where we work in Oshawa

Near Oshawa Centre, Lakeview Park, Ontario Tech University

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Reviews

What Oshawa customers say

4.9 out of 5 from 150+ customer reviews

Old boiler, older house. They were realistic about the options and did not push the most expensive one.

RRosanne B.O'Neill

New-build furnace replacement done cleanly and on time. Clear quote with nothing added afterwards.

CCurtis N.Windfields

Local FAQ

HVAC Oshawa Questions: Costs, Boilers & Red Tags

How quickly can an HVAC technician get to my home in Oshawa?

Two hours is our emergency target across Oshawa, including Downtown Oshawa, O'Neill, Lakeview, Taunton, Windfields, and Kedron, the same as the rest of our GTA coverage. Gas emergencies, Enbridge red tags, and no-heat or no-AC calls are dispatched 24/7, and same-day repair visits are available for most calls Monday through Saturday.

How much does furnace or AC repair cost in Oshawa?

Every visit starts with a $150 diagnostic, and most furnace and air conditioner repair visits run $250 to $500 at 2026 pricing depending on the part and labour involved. You get the price in writing before any work begins, with no hidden fees.

How much does a new furnace, boiler, or heat pump cost in Oshawa?

At 2026 pricing, a new furnace typically costs $3,500 to $7,500 installed depending on the efficiency tier, boiler installation runs $5,000 to $15,000 depending on type and capacity, and a cold-climate heat pump runs $8,000 to $15,000 before rebates. Installation estimates are free and come with a written quote.

Do you service cast iron boilers in older Oshawa homes?

Yes. We repair and replace cast iron sectional boilers and hydronic radiator systems, which are common in Downtown Oshawa, O'Neill, and McLaughlin, including circulator pumps, expansion tanks, and low-water cutoffs. Where replacement makes sense we can move you to a condensing boiler without redoing the radiators.

Who clears Enbridge red tags in Oshawa?

Our TSSA G1/G2 licensed technicians handle the full inspection, repair, and signed clearance so Enbridge can restore your gas, typically within 24 hours of the first visit. Red tag clearance starts from $350 for a basic inspection.

Are heat pumps worth it for Oshawa winters?

For many homes, yes. Newer, well-insulated houses in Taunton, Windfields, and Kedron have lower heating loads, which is where cold-climate heat pumps perform best, and older homes can pair one with a gas furnace as a dual-fuel setup. As of 2026, eligible installs can qualify for up to $6,500 in combined Ontario and federal rebates, and Best HVAC Toronto handles the application paperwork.

Should I repair or replace an old furnace in my Oshawa home?

A furnace past 15 to 20 years with a major failure, such as a cracked heat exchanger, is usually worth replacing rather than repairing. We test the system first and give an honest recommendation either way. Many post-war homes in Vanier and Donevan, and the first builder furnaces in Taunton, are due for that decision now.

Do you offer financing on HVAC installations in Oshawa?

Yes. Financing is available on approved credit, and lease-to-own equipment programs with zero down are offered for qualifying installations. We accept cash, credit card, e-transfer, and cheque.

We also cover the areas around Oshawa

Same technicians, same response targets, same warranty.

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24/7 for gas emergencies, red tags, no-heat and no-AC

Need an HVAC technician in Oshawa?

2-hour emergency response for emergencies, with 24/7 dispatch for gas, red tag, no-heat, and no-AC calls.

  • Manufacturer registration filed on your behalf
  • Written quotes before work starts
  • TSSA G1/G2 certified, WSIB covered
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